Every year about one million tourists visit Stonehenge, which is believed __________before the Pyramids, about 4,000 years ago. 
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A
to build
B
to have built
C
to be built
D
to have been built
推荐题目
________ for several weeks,the city needed food.
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A
As having flooded
B
Being flooded
C
Having been flooded
D
To flood
The class __________ 80 students is hard to manage.
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A
making up of
B
consists of
C
consisting of
D
made up
Time ____ never comes again. So we’d better make full use of our time. 
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A
losing
B
lost
C
being lost
D
having lost